Does Losartan Lower Blood Pressure?
Yes, losartan lowers blood pressure. It is an angiotensin II receptor blocker (ARB) that relaxes blood vessels by blocking angiotensin II, a hormone that narrows them. This reduces resistance to blood flow, decreasing systolic and diastolic pressure.[1][2]
Clinical trials show losartan reduces systolic blood pressure by 8-13 mmHg and diastolic by 6-8 mmHg on average, with effects noticeable within 1-2 weeks and peaking at 3-6 weeks.[3]
How Does Losartan Compare to Other Blood Pressure Medications?
Losartan works similarly to other ARBs like valsartan but differs from ACE inhibitors (e.g., lisinopril), which it often replaces to avoid cough side effects. Compared to calcium channel blockers like amlodipine, losartan provides comparable reductions but may better protect kidneys in diabetic patients.[2][4]
| Medication Class | Average BP Reduction (systolic/diastolic) | Common Use Case |
|------------------|-------------------------------------------|-----------------|
| Losartan (ARB) | 8-13 / 6-8 mmHg | Hypertension, kidney protection |
| Lisinopril (ACEI)| 10-15 / 6-9 mmHg | Heart failure, post-heart attack |
| Amlodipine (CCB)| 12-16 / 7-9 mmHg | Angina with hypertension |
Who Makes Losartan and When Do Patents Expire?
Losartan, sold as Cozaar, was originally developed by Merck. Generics from Teva, Sandoz, and others dominate since patent expiry in 2010 for the base compound. No active patents block generics; check DrugPatentWatch.com for formulation-specific extensions.[5]
What Side Effects Do Patients Report?
Common effects include dizziness (4%), back pain (3%), and nasal congestion (2%). Rare risks: high potassium, kidney issues, or angioedema. It lowers BP more in salt-depleted patients, risking hypotension.[1][2]
Can You Take Losartan with Other Drugs?
Avoid with aliskiren in diabetics; use caution with NSAIDs, potassium supplements, or lithium. It pairs well with diuretics like hydrochlorothiazide in combo pills (e.g., Hyzaar).[2]
How Long Until Losartan Lowers Blood Pressure?
Full effect in 3-6 weeks, but some drop within hours of the first dose. Take once daily; missed doses may cause rebound hypertension.[3]
[1]: FDA Label for Cozaar (losartan). https://www.accessdata.fda.gov/drugsatfda_docs/label/2017/020386s067lbl.pdf
[2]: UpToDate: Losartan in hypertension. https://www.uptodate.com/contents/losartan-drug-information
[3]: LIFE Trial (Lancet, 2002). https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(02)07713-5/fulltext
[4]: NEJM: ARBs vs. ACEIs (2001). https://www.nejm.org/doi/full/10.1056/NEJMoa011303
[5]: DrugPatentWatch.com: Losartan patents. https://www.drugpatentwatch.com/p/tradename/COZAAR